### mac_n_cheese_pog's blog

By mac_n_cheese_pog, history, 3 years ago,

dunno whats wrong

int n;

cin >> n;

int a[100][100];

for(int i=0;i<n;i++)

{

for(int j=0;j<n;j++)

{

cin >> a[i][j];

}

}

for(int i=0;i<n;i++)

{

for(int j=0;j<n;j++)

{

cout << a[i][j];

}

cout << endl;

}

• -30

| Write comment?
 » 3 years ago, # | ← Rev. 2 →   -8 If Your value of n is >=101 your code will give RTE.I hope this will be helpful.
•  » » 3 years ago, # ^ |   0 i tried a[n][n] but cant,so i deciced to fix the size
•  » » » 3 years ago, # ^ |   -8 Yes you should try to use a[n][n] but only for a specific upper bound of n this notation is valid.Not sure but allocation of around [100000][100000] give error in my machine :( Don't know the accurate upper bound.
•  » » » » 3 years ago, # ^ |   +3 of course it gives an error, 100000*100000 integers is about 40000 megabytes
 » 3 years ago, # |   0 You don't understand what a 2D array memorizes.If we define a[N][M] , that means you can use a[0~N-1][0~M-1] , and other position will get some wrong value or Runtime Error.If N,M is too big , you will get Memory Limit Exceeded.
•  » » 3 years ago, # ^ |   0 actually,ima give the problem i tried to solve https://codeforces.com/contest/1360/problem/E submission:https://pastebin.com/fN5BxL0e
•  » » » 3 years ago, # ^ |   0 That's a string , not a number in the 2D array in the problem.So you shouldn't read a number , but a char.